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BUG: KCSAN: data-race in add_input_randomness / add_input_randomness

read to 0xffffffff88be6c14 of 1 bytes by interrupt on cpu 0:
 add_input_randomness+0x35/0x2a0 drivers/char/random.c:1207
 input_handle_event+0x6a1/0xd30 drivers/input/input.c:373
 input_event+0x7d/0xa0 drivers/input/input.c:441
 hidinput_hid_event+0xa3e/0xb90 drivers/hid/hid-input.c:1394
 hid_process_event+0x2f3/0x3c0 drivers/hid/hid-core.c:1519
 hid_input_field drivers/hid/hid-core.c:1577 [inline]
 hid_report_raw_event+0xb96/0xd60 drivers/hid/hid-core.c:1783
 hid_input_report+0x2c9/0x330 drivers/hid/hid-core.c:1850
 hid_irq_in+0x2cb/0x3d0 drivers/hid/usbhid/hid-core.c:284
 __usb_hcd_giveback_urb+0x219/0x290 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0xae/0x210 drivers/usb/core/hcd.c:1716
 dummy_timer+0x4d3/0x2390 drivers/usb/gadget/udc/dummy_hcd.c:1967
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1415
 expire_timers+0x116/0x260 kernel/time/timer.c:1460
 __run_timers+0x328/0x3c0 kernel/time/timer.c:1752
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1765
 __do_softirq+0x12c/0x2b1 kernel/softirq.c:298
 asm_call_irq_on_stack+0xf/0x20
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu+0xb2/0xc0 kernel/softirq.c:423
 sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
 acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:517 [inline]
 acpi_idle_enter+0x25b/0x2e0 drivers/acpi/processor_idle.c:648
 cpuidle_enter_state+0x2bd/0x750 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:132 [inline]
 cpuidle_idle_call kernel/sched/idle.c:213 [inline]
 do_idle+0x193/0x230 kernel/sched/idle.c:273
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:369
 rest_init+0xd7/0xe0 init/main.c:711
 arch_call_rest_init+0xa/0xb
 start_kernel+0x5a0/0x625 init/main.c:1051
 secondary_startup_64_no_verify+0xa6/0xab

write to 0xffffffff88be6c14 of 1 bytes by interrupt on cpu 1:
 add_input_randomness+0x66/0x2a0 drivers/char/random.c:1210
 input_handle_event+0x6a1/0xd30 drivers/input/input.c:373
 input_event+0x7d/0xa0 drivers/input/input.c:441
 hidinput_hid_event+0xa3e/0xb90 drivers/hid/hid-input.c:1394
 hid_process_event+0x2f3/0x3c0 drivers/hid/hid-core.c:1519
 hid_input_field drivers/hid/hid-core.c:1571 [inline]
 hid_report_raw_event+0xa73/0xd60 drivers/hid/hid-core.c:1783
 hid_input_report+0x2c9/0x330 drivers/hid/hid-core.c:1850
 hid_irq_in+0x2cb/0x3d0 drivers/hid/usbhid/hid-core.c:284
 __usb_hcd_giveback_urb+0x219/0x290 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0xae/0x210 drivers/usb/core/hcd.c:1716
 dummy_timer+0x4d3/0x2390 drivers/usb/gadget/udc/dummy_hcd.c:1967
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1415
 expire_timers+0x116/0x260 kernel/time/timer.c:1460
 __run_timers+0x328/0x3c0 kernel/time/timer.c:1752
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1765
 __do_softirq+0x12c/0x2b1 kernel/softirq.c:298
 asm_call_irq_on_stack+0xf/0x20
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu+0xb2/0xc0 kernel/softirq.c:423
 sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
 acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:517 [inline]
 acpi_idle_enter+0x25b/0x2e0 drivers/acpi/processor_idle.c:648
 cpuidle_enter_state+0x2bd/0x750 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:132 [inline]
 cpuidle_idle_call kernel/sched/idle.c:213 [inline]
 do_idle+0x193/0x230 kernel/sched/idle.c:273
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:369
 secondary_startup_64_no_verify+0xa6/0xab

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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